import { validPhone } from './validate'

// 单词首字母转大写
export function toUpperCaseWord( val?: string ): string {
  if ( !val ) return ''
  return val.toLowerCase().replace( /( |^)[a-z]/g, L => L.toUpperCase() )
}

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime( time?: object | string | number | null, cFormat?: string ): string | null {
  if ( arguments.length === 0 || !time ) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date: Date
  if ( typeof time === 'object' ) {
    date = time as Date
  } else {
    if ( typeof time === 'string' ) {
      if ( /^[0-9]+$/.test( time ) ) {
        // support "1548221490638"
        time = parseInt( time )
      } else {
        // support safari
        // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
        // eslint-disable-next-line prefer-regex-literals
        time = time.replace( new RegExp( /-/gm ), '/' )
      }
    }

    if ( typeof time === 'number' && time.toString().length === 10 ) {
      time = time * 1000
    }
    date = new Date( time )
  }
  const formatObj: { [key: string]: number } = {
    y : date.getFullYear(),
    m : date.getMonth() + 1,
    d : date.getDate(),
    h : date.getHours(),
    i : date.getMinutes(),
    s : date.getSeconds(),
    a : date.getDay()
  }
  const time_str = format.replace( /{([ymdhisa])+}/g, ( result, key ) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if ( key === 'a' ) {
      return ['日', '一', '二', '三', '四', '五', '六'][value]
    }
    return value.toString().padStart( 2, '0' )
  } )
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime( time: string | number, option?: string ) {
  if ( ( '' + time ).length === 10 ) {
    time = parseInt( time ) * 1000
  } else {
    time = +time
  }
  const d: any = new Date( time )
  const now: number = Date.now()

  const diff: number = ( now - d ) / 1000

  if ( diff < 30 ) {
    return '刚刚'
  } else if ( diff < 3600 ) {
    // less 1 hour
    return Math.ceil( diff / 60 ) + '分钟前'
  } else if ( diff < 3600 * 24 ) {
    return Math.ceil( diff / 3600 ) + '小时前'
  } else if ( diff < 3600 * 24 * 2 ) {
    return '1天前'
  }
  if ( option ) {
    return parseTime( time, option )
  } else {
    return d.getMonth() + 1 + '月' + d.getDate() + '日' + d.getHours() + '时' + d.getMinutes() + '分'
  }
}

export function encryptionPhone( val: string | number ) {
  const phone = val + ''
  if ( !validPhone( phone ) ) {
    return ''
  }
  const reg = /^(\d{3})\d{4}(\d{4})$/
  return phone.replace( reg, '$1****$2' )
}
